Keyboard



FIG. 1 is a left front perspective view of a keyboard housing showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

The broken lines are shown in FIGS. 1 and 2 for illustrative purposes only. 

The ornamental design for a keyboard, as shown. 